Received: 30 July 2019
Accepted: 3 November 2020
First Online: 10 November 2020
Ethical approval and consent to participate
: The study obtained legal permission from Orotta School of Medicine and Dentistry, and Ministry of Health for health research proposal review and ethical committee, Asmara, Eritrea (Ref: OSM 29/290/18).
: Not applicable.
: The authors declare that they have no competing interests.